Medical Micro-robots Made As Small As Bacteria

For the first time, ETH Zurich researchers have built micro-robots as small as bacteria. Their purpose is to help cure human beings.

They look like spirals with tiny heads, and screw through the liquid like miniature corkscrews. When moving, they resemble rather ungainly bacteria with long whip-like tails. They can only be observed under a microscope because, at a total length of 25 to 60 µm, they are almost as small as natural flagellated bacteria. Most are between 5 and 15 µm long, a few are more than 20 µm

Medical Micro-robots Made As Small As Bacteria